Cyanobacteria?

[Noahspapa]

My 120P is about a month planred and today i noticed something growing on small crypts. I also see darkness on the sand which i was initially attributing to root tans dissolving- but im wondering if this is cyanobacteria?

Please take a look and let me know what you think.

 

[Mr.Shenanagins]

I’m seeing staghorn algae, hard to tell from the pictures though if there’s any cyano. IMO it doesn’t look like it, but likely the foreground is struggling with getting sufficient CO2 laden water flow.

 

[Unexpected]

I'm not seeing Cyano.

 

[Noahspapa]

What do you make of the darkness in the sand?

 

[Unexpected]

What do you make of the darkness in the sand?

Pretty normal. You can vacuum it to keep it looking fresher.

 

[Noahspapa]

Excellent. Thank you.

 

[BigWave]

Cyano has a distinct real earthy smell that will make your nose hair curl up and die. Very pungent also wear gloves when handling it. IT WILL BURN BARE SKIN. FYI I dont see any either.